The journal consists of just seven pages of handwriting in a hard-bound book.

For CNN, the ambassador's writings served as tips about the situation in Libya, and in Benghazi in particular. CNN took the newsworthy tips and corroborated them with other sources.

A source familiar with Stevens' thinking told CNN earlier this week that, in the months leading up to his death, the late ambassador worried about what he called the security threats in Benghazi and a rise in Islamic extremism.